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goodman2253
Yak Posting Veteran

86 Posts

Posted - 07/09/2013 :  10:30:39  Show Profile  Reply with Quote
Hello All

I am struck in a query and want some help. I have a table name table1 which contain two coulumn columnA and columnB as below

columnA------columnB
12------A
12------B
13------A
14------C
15------B
13------B
16------A
15------C
16------B

I want to write the sql query which give output as below

Output Required

ColumnA------Count------Common
12------2------A,B
13------2------A,B
14------1------C
15------2------B,C
16------2------A,B

SwePeso
Patron Saint of Lost Yaks

Sweden
30276 Posts

Posted - 07/09/2013 :  10:49:40  Show Profile  Visit SwePeso's Homepage  Reply with Quote
-- Prepare sample data
DECLARE	@Sample TABLE
	(
		ColumnA TINYINT NOT NULL,
		ColumnB CHAR(1) NOT NULL
	);

INSERT	@Sample
	(
		ColumnA,
		ColumnB
	)
VALUES	(12, 'A'),
	(12, 'B'),
	(13, 'A'),
	(14, 'C'),
	(15, 'B'),
	(13, 'B'),
	(16, 'A'),
	(15, 'C'),
	(16, 'B');

-- SwePeso
SELECT		b.ColumnA,
		b.Items AS [Count],
		STUFF(f.Data, 1, 1, '') AS Common
FROM		(
			SELECT		ColumnA,
					COUNT(*) AS Items
			FROM		@Sample
			GROUP BY	ColumnA
		) AS b
CROSS APPLY	(
			SELECT DISTINCT	',' + x.ColumnB
			FROM		@Sample AS x
			WHERE		x.ColumnA = b.ColumnA
			ORDER BY	',' + x.ColumnB
			FOR XML		PATH('')
		) AS f(Data)
ORDER BY	b.ColumnA



N 56°04'39.26"
E 12°55'05.63"
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